This would more than offset continued shrinkage of demand in the 34 countries in the OECD area, with China forecast to remain "the main engine of demand growth in 2014."

For this year, because of a big increase in demand for heating oil in the northern hemisphere in the second quarter, the agency raised its estimate for global oil demand by 215,000 barrels a day.

This took the overall estimated annual growth to 930,000 barrels a day, and total consumption to 90.8m barrels a day.

Data show that this figure is a record and the IEA estimates show demand rising by a further 1.2m barrels a day next year.

The IEA said that oil prices had risen recently because of concerns that unrest in Egypt could affect supplies via the Suez Canal and the SUMED pipeline which runs from the Gulf of Suez to the Mediterranean Sea.

"Observers worry that the political confrontation in Egypt, like the Syrian civil war, could drag on and worsen before it gets better, and the instability could theoretically threaten production and transit through the Suez Canal," the IEA said.

Unrest had also disrupted supplies from Libya, Nigeria and Iraq, the IEA noted.

Another factor was temporary disruption to some supply routes within the United States.

In June, production by Saudi Arabia had risen by 100,000 barrels a day to 9.7m barrels a day, the highest level for seven months.

Brent crude climbed to a more than three-month high of $108.84 a barrel on Thursday amid hopes that the US Federal Reserve may keep its stimulus programme for now.